montebo



JUAN c. MoNTERo, or WASHINGTON, DISTRICT or COLUMBIA.

PROJECTILE.

Specicatien vof Letters Patent.

Patented Sept. 23, 1919.

Application filed April 6, 1918. Serial No. 227,010.

To all whom it may concern:

Be it known that I, J UN C. MONTERO, al

citizen of the Philippine Islands, and a. resident Aof Washington, in the District of Columbia, have invented a certain new and useful Improvement in Projectiles, of which the following is a specification.

lMy present invention relates to projectiles, and more particularly to a device of thisv character adapted to be used in naval v guns or in coast defense ordnance.

The principal object of my invention is to provide a projectile which can be used -for long distance firing or for close range work,

and which will not ricochet upon striking the water when red at a low angle or at a mark close at hand.

A further object is to so construct the pro-.

jectile that it maybe yfitted with a contact head, and which due to its construction will carry true to its mark and will strike 'to cX- plode below the water line; or, which may have a time fuse fitted in conjunction therewith and may then be used effectively as a defense against torpedoes by being properly timed and then fired to diver and carry adjacent the'torpedo, the timing mechanism of course being set so that the explosion will occur when the projectile is ina proximate position,

Further objects ofmy invention will appear 'in the following description, taken in conjunction with the accompanying drawing, forming a part of this specification, and in which drawing:

Figure l is a view in elevation of a projectile constructed after the manner of my invention.

Fig. 2 is a view taken somewhat after the manner of Fig. 1 and with partsillustrated in vertical section tofbetter disclose the construction and assembly of the elements of the projectile. y

Fig. 3 is a cross sectional view through the inner member of the projectile, taken substantially on the line :v -.r of Fig. 2.

Fig.- 4 is a sectional view through the outer member of the projectile, and also taken on the line :v+m of Fig. 2.

In the drawing, where similar characters refer to similar parts throughout the views, A designates an outer member of tubular form which is closed at one end, and which might be Iturned out of a. forging, or made up in any other desired manner, while B designates an inner member made of cylindrical contour and adapted to be iitted within the tubular member.

As has been stated, the outermember A is made of substantially tubular form by having a bore 1 provided therein and extending axially, the'rear end being closed as indicated atv 2, and the forward end being reamed 'around the bore as at 3, to provide a cup. The inner member B is in its main line oil-substantially cylindrical form, and the forward end is shaped to provide the spiral vanes 4, which are given-a pitch toconform substantially to the rifling of the gun from which the projectile is to be'ired, it of course being understood that these vanes will 'be turned 4s`o that as the projectile revolves in its Hight a boring in action is accomplished, and as is better shown in Fig. 3, the vanes .are made somewhat sharp on their forward edges, vand might even be undercut should this be deemed desirable. The inner end of the member B is left with-4 out cutting and is made of the full diameter, and is then bored to provide an explosive chamber 5, a firing cap 6, which is here shown as of the contact or Ipercussion type being provided to fire this charge at the proper time and to burst the projectile. The passages between the vanes 4 terminate in a sloping shoulder 7, and lthe outer member A' is cut through at its sides to provide passages 8 which communicate with the spaces as the vanes 4 so that uid. passing between the vanes will How in a gradual stream 'and before the vessel is in such proximity there without interruption through these passaUeS 8.

fhe use of the projectile will be somewhat as follows Assuming that the projectile is to he used in the destruction ot' ships. as a defense againstsubmariges, or in some other like connect-ion where' a relatirelv large hul k is presented below' the water line. the projectile will be tired from a gun in the usual manner, aimhowever being take'ii so that in vits flightl the projectile will strike the water somewhat short of its mark. As the projectile isV whirling in such 'a direction that the vanes et are boring through the air caughtby the cup this whirlingin ovementv is maintained, and when the projectile strikes the water itwill suhmerge and carry in a. straight line and a true path due to this whirling force owing to the t'actthat the water is caughty within the cup 3. and also through the boring-in loree accomplished by the Yanes l. As the pressure ot' the water within the oup 3 will be substantially equalized, owing to the fact that an even number of yvanes is employed as shown in Fig. 3, and the water will pass in equalized streams hack through between the vanes -t and out of the oj'ienings 8, at approximately the Center of equilibrium lengthwise ol the project-ile, the projectile will' he balanced-in its travel and will carry without deviating from the path of travel followed previous to submersion. ln thisl use. the projectile will carry true to the mark and through contacty invention; linut74 of the heads 6, with a vessel hull, or other Solid objects the projectile will he exploded.

'here the projectile .is tobe used as a defense against torpedoes. it will he ttted with a time fuse, and this fuse will he set. previous to firing. so that the projertile will strike the water and suhnie'rge adjacent the torped- :and will then he fired when in proximity ii "reto,

Since the modern torpedo ina \v he set otl 0r fired by the inertia o'lia small `fieel hammer or striker'. due to the least shock. ahead 0r lateral, projectiles eonstrueted according to my invention ina he tired in the general path f the torpedo. ohserving its wake and when exploded the coneussion will render the torpedo ineiirctive as a destrurtion agent h v setting it otil prior to its reaching thi` mark. The projectile may also heetlec! ivelar used to clear the path of the vessel or \'essels of tioating mines ot' the vpes whit-h are destroyed h v rocking and the like. The gun crew may point the gunstorwardiv or according to the path to he taken hy the vessel and use projectiles eonsl rui-ted aerox-ding to my invention to agitate (he water. tielow its surface, causing such mines to detonaie.

Lj 4niijetile including,an-outer member and `an "inner member having longitudinally extending spiral vanos the'ieon. said outer memher provided with a circumferential Cavity formed at its forward end7 and surrounding said vvanes and leading inwardly, constituting means to guard against a ricochet action as the projectile strikes a vwater surface when fired at a low angle..

2. A. projectile including an outer member ot' substantially tubular Yforni Aclosed at; one end and having openings through the sides thereof intermediate its ends,v an inner men'il'ier shaped to provide, a pluralit)Y ot' spiral Yanes forming spiral passageway-s in the inner member leading to said'openings, the 'forward end of said outer meint-ier having a circumferential cutting edge formed thereon to guard-against rieoehet action as theI j'irojectile strikesa water surface, when tired atr a low angle.

3. A projectile ci'unprising airouier and an inner niemhtu'` said outer inemher haring a'eup 'formed at. the t'oruard end thereof and heilig provided with passages through the .side thereotJ spared rear\\'ardl v from the oupf said inner memher having vanes there on extending from the i`oi'\\'ard end oil the. inner member to a point opposite the side passages. the `ranes providing therehetween passages toi .ned to estalilish eomnxnnication from the cup to the side opening passages oi' the outer nieiniiier.

-t. A projectile eoinprising with an outer niemher hored longiiudinall) and reamed at the outer (unl oir the liore to provide a cup. said outer niemher having passages leading ai the sides thereof from the ventral hore. an inner meniher ot' ovliudrical form to he tilted ano` held within the liore ol the outer memher provided ai its forward end with vanes hetween which passages v are formed to estahlish connunniratiou 't'roni the cup nt' the outer uieinher lo the side opening passages thereof.

5. projectile inrluding with mi outer melnlier ot snlistai'itialtv iuhular l'orin closed at one end and reamed oiil ai the remaining end to provide a i'up t'orm. .said ineniher havingopenings through the sides thereot in the middle portion. an inner nieinlier ol: substantially cylindrical form hollowed out at its inner end to provide an explosive ren reiving rhamher and iliade pointed at its outer end at whirh point a tiring rap is applied. said inner inenilier lieing shaped to provide vanes spirally disposed thereon to from the spirit or scope ot my substantially follow theline of the rifling of the gun from which the projectile 4isto be fired and having spaced therebetween leading to the openings through the outer member.

6. A projectile including an outer ineinber, an in`ner nieniber projecting beyond the forward end of the outer member, said outer member provided With' a circumferential 1 0 cutting edge at its forward end and surrounding said inner member .to guard against the ricochet action as the projectile strikes the Water vsurface when fired at a low angle. Y

7. A projectilev having a cup at its forward end and vanes leading longitudinally and rearwardly from the cup and v'fern'iinating in flaring passages at approximately the center of equilibrium of the projectile'.

- JUAN C. MONTERO. 

